#include <stdio.h>
#include <iostream>
#include <math.h>
//双引号代表自己定义 
#include "head_file.h"
using namespace std;
//引用自function2
void multiply(int a, int b) {
    cout << "multiply result: " << a * b << endl;
}

void print_arr(int arr[], int n) {
    for (int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
        if (i == n - 1) {
            printf("\n");
        }
    }
}
